. >> daddy, what city are you in? >> their parent, for the most part, keep them out of the spotlight but on stage on election night they were beaming and, boy, have they grown. doug has written about presidential families for two decades and interviewed 19 presidential children. >> the most successful presidential children in history have been children who were kept out of the limelight during their father's presidency. this was a study that jacqueline kennedy made and concluded. the obamas have subscribed to that and historically, this has proven to be the wisest form of presidential parenting. >> reporter: while we haven't heard much directly from the two girls over the years, their parents share quite a bit about them. listen to what the president told abc's robin roberts about his daughters last year. >> they're smart, funny and most importantly they're kind, they're respectful, they're responsible, they're well behaved. i could not have asked for better kids. i should also point out that i had men with guns that